Add display "route" your army in map. Put point between a route will allow you to adjust the route as you need it.
Add design mode as in town-planning simulators. Location and movement of buildings, walls, towers. This will allow you to set up castles, cities, villages, and modulate them from scratch. Or destroy them as in Total War: Attila.
I understand that these things need detailing, and creating them will take a long time (maybe). But it may interest.